Ill be posting up a vid probably tomorrow evening..in that vid ill have the guarder 6.02 tbb and guarder hop up unit and a+ studios reaps bucking. I'm hoping for at least a consistant 400 fps or a lil more. Another option might be the ra-tech npas nozzle. I don't see to many ppl experimenting with that so I guess I will soon lol..I think the low fps has a lot to do with the rocket valve spring and the hop up bucking used..the bucking material is soo thin that I think a lot of blowby happens when propelling the bb. Just by changing my bucking to a ra-tech ksc m4 bucking it did bring me really close to 400fps. Sub to my channel as ill be posting some trial and error vids on my LM4.

Hows the KJ NPAS holding up? I cant seem to get definitive info on the KSC NPAS working in the KWA nozzle. I understand that we cant discuss non ATF approved KSC guns on the forum but can we discuss parts? such as the NPAS? I was hoping Allizard would step in and answer a question I posted last week but no luck. Is he able to discuss?

I'd be very interested in what'd happen with the RA Tech NPAS kit. The US version of the LM4 has a slightly restricted air nozzle to reduce power. So you'd probably see a dramatic FPS increase if you replaced the piston with the RA Tech NPAS. Allen has tried it, at least in the prototypes and it worked. But he doesn't recommend it, not sure why. It'll probably work fine, and boost the FPS to about 550 at maximum.
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Yeah, we've seen all the vids and discussed in detail. I wish RATech would just sell the npas alone and not just in the KSC nozzle or entire BCG. The nozzle is obviously different between the two, one having metal and the other not. I hope that the inner dimensions of the nozzles are the same between KSC and KWA, that would make it a simple swap.

Yeah, we've seen all the vids and discussed in detail. I wish RATech would just sell the npas alone and not just in the KSC nozzle or entire BCG. The nozzle is obviously different between the two, one having metal and the other not. I hope that the inner dimensions of the nozzles are the same between KSC and KWA, that would make it a simple swap.

Of course. The KWA nozzle is plastic AND metal where as the KSC is all plastic. The KWA has the better nozzle in my opinion that is why I want to install the RATech NPAS valve in the KWA nozzle. If you look above BoobieM4H has installed a KJW NPAS valve in the KWA nozzle with great results. It is not hard to remove the nozzle from the bolt nor is it difficult to disassemble the nozzle to get to the rocket vavle/NPAS.

Of course. The KWA nozzle is plastic AND metal where as the KSC is all plastic. The KWA has the better nozzle in my opinion that is why I want to install the RATech NPAS valve in the KWA nozzle. If you look above BoobieM4H has installed a KJW NPAS valve in the KWA nozzle with great results. It is not hard to remove the nozzle from the bolt nor is it difficult to disassemble the nozzle to get to the rocket vavle/NPAS.

Hmm... I didn't know that'd be possible. I figured the KSC NPAS piston would be proprietary. If it'd work that'd be nice, but there's still the restriction.